Ahhh, ok...I just quick read your disappioned thread on SSA. I didnt see where you cut it back to get into 39.9 class. My fault for not reading all the way through //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
A mic will be your best investment. I PROMISE you that. Finding your peak is also a major thing, kinda need to know that.
How big is your current box? With the 15" mags and the power you have, knowing that you said in the past you want a daily street beater, Id do ~6 cubes net. LOTS of port area somewhere in the 100sq.in. range. Tune it in the 34 range for daily and then maybe 36-38 depending on your peak freq.
Chevy's was tuned in teh 50hz range by mistake and his peak note was 41hz //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif funny thing was, the mag was blasting away WAY below tuning and still wanted more power //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Good enough for a 46.1 on 1800watts.